// tspcluster - Traveling Salesman Problem
// Copyright (C) 2006  Frederik Carlier
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA

using System;
using System.Collections.Generic;
using System.Text;

namespace UGent.Tsp
{
    /// <summary>
    /// Exposes methods to work with cyclic variables.
    /// </summary>
    static class Cyclic
    {
        public static int GetIndex(long index, int count)
        {
            int value = (int)index % count;
            if (value < 0)
                value = value + count;

            return value;
        }
        
        public static int GetIndex(int index, int count)
        {
            int value = index % count;
            if (value < 0)
                value = value + count;

            return value;
        }
    }
}
